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-rw-r--r--src/libsystemd-network/arp-util.h2
-rw-r--r--src/libsystemd-network/dhcp-internal.h3
-rw-r--r--src/libsystemd-network/dhcp-lease-internal.h7
-rw-r--r--src/libsystemd-network/dhcp-option.c109
-rw-r--r--src/libsystemd-network/dhcp-protocol.h13
-rw-r--r--src/libsystemd-network/dhcp-server-internal.h7
-rw-r--r--src/libsystemd-network/dhcp6-lease-internal.h1
-rw-r--r--src/libsystemd-network/dhcp6-option.c18
-rw-r--r--src/libsystemd-network/icmp6-util.c44
-rw-r--r--src/libsystemd-network/lldp-tlv.h8
-rw-r--r--src/libsystemd-network/network-internal.h2
-rw-r--r--src/libsystemd-network/sd-dhcp-client.c105
-rw-r--r--src/libsystemd-network/sd-dhcp-lease.c2
-rw-r--r--src/libsystemd-network/sd-dhcp-server.c19
-rw-r--r--src/libsystemd-network/sd-dhcp6-client.c22
-rw-r--r--src/libsystemd-network/sd-ndisc.c87
-rw-r--r--src/libsystemd-network/test-dhcp-client.c6
-rw-r--r--src/libsystemd-network/test-dhcp-option.c22
18 files changed, 295 insertions, 182 deletions
diff --git a/src/libsystemd-network/arp-util.h b/src/libsystemd-network/arp-util.h
index 44e5c893a7..63c559f8dd 100644
--- a/src/libsystemd-network/arp-util.h
+++ b/src/libsystemd-network/arp-util.h
@@ -23,8 +23,8 @@
#include <netinet/if_ether.h>
-#include "sparse-endian.h"
#include "socket-util.h"
+#include "sparse-endian.h"
int arp_network_bind_raw_socket(int index, be32_t address, const struct ether_addr *eth_mac);
diff --git a/src/libsystemd-network/dhcp-internal.h b/src/libsystemd-network/dhcp-internal.h
index a5daaa543a..7038212bcf 100644
--- a/src/libsystemd-network/dhcp-internal.h
+++ b/src/libsystemd-network/dhcp-internal.h
@@ -47,8 +47,7 @@ int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset, uint8_
typedef int (*dhcp_option_cb_t)(uint8_t code, uint8_t len,
const void *option, void *userdata);
-int dhcp_option_parse(DHCPMessage *message, size_t len,
- dhcp_option_cb_t cb, void *userdata);
+int dhcp_option_parse(DHCPMessage *message, size_t len, dhcp_option_cb_t cb, void *userdata, char **error_message);
int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid,
uint8_t type, uint16_t arp_type, size_t optlen,
diff --git a/src/libsystemd-network/dhcp-lease-internal.h b/src/libsystemd-network/dhcp-lease-internal.h
index c6b97ca8f7..138bdd9691 100644
--- a/src/libsystemd-network/dhcp-lease-internal.h
+++ b/src/libsystemd-network/dhcp-lease-internal.h
@@ -25,12 +25,11 @@
#include <stdint.h>
#include <linux/if_packet.h>
-#include "util.h"
-#include "list.h"
+#include "sd-dhcp-client.h"
#include "dhcp-protocol.h"
-
-#include "sd-dhcp-client.h"
+#include "list.h"
+#include "util.h"
struct sd_dhcp_route {
struct in_addr dst_addr;
diff --git a/src/libsystemd-network/dhcp-option.c b/src/libsystemd-network/dhcp-option.c
index a6c410ba91..1de7f3639c 100644
--- a/src/libsystemd-network/dhcp-option.c
+++ b/src/libsystemd-network/dhcp-option.c
@@ -24,6 +24,9 @@
#include <stdio.h>
#include <string.h>
+#include "alloc-util.h"
+#include "utf8.h"
+
#include "dhcp-internal.h"
static int option_append(uint8_t options[], size_t size, size_t *offset,
@@ -139,72 +142,84 @@ int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset,
}
static int parse_options(const uint8_t options[], size_t buflen, uint8_t *overload,
- uint8_t *message_type, dhcp_option_cb_t cb,
+ uint8_t *message_type, char **error_message, dhcp_option_cb_t cb,
void *userdata) {
uint8_t code, len;
+ const uint8_t *option;
size_t offset = 0;
while (offset < buflen) {
- switch (options[offset]) {
- case DHCP_OPTION_PAD:
- offset++;
+ code = options[offset ++];
- break;
+ switch (code) {
+ case DHCP_OPTION_PAD:
+ continue;
case DHCP_OPTION_END:
return 0;
+ }
- case DHCP_OPTION_MESSAGE_TYPE:
- if (buflen < offset + 3)
- return -ENOBUFS;
+ if (buflen < offset + 1)
+ return -ENOBUFS;
+
+ len = options[offset ++];
- len = options[++offset];
+ if (buflen < offset + len)
+ return -EINVAL;
+
+ option = &options[offset];
+
+ switch (code) {
+ case DHCP_OPTION_MESSAGE_TYPE:
if (len != 1)
return -EINVAL;
if (message_type)
- *message_type = options[++offset];
- else
- offset++;
-
- offset++;
+ *message_type = *option;
break;
- case DHCP_OPTION_OVERLOAD:
- if (buflen < offset + 3)
- return -ENOBUFS;
-
- len = options[++offset];
- if (len != 1)
+ case DHCP_OPTION_ERROR_MESSAGE:
+ if (len == 0)
return -EINVAL;
- if (overload)
- *overload = options[++offset];
- else
- offset++;
+ if (error_message) {
+ _cleanup_free_ char *string = NULL;
- offset++;
+ /* Accept a trailing NUL byte */
+ if (memchr(option, 0, len - 1))
+ return -EINVAL;
- break;
+ string = strndup((const char *) option, len);
+ if (!string)
+ return -ENOMEM;
- default:
- if (buflen < offset + 3)
- return -ENOBUFS;
+ if (!ascii_is_valid(string))
+ return -EINVAL;
- code = options[offset];
- len = options[++offset];
+ free(*error_message);
+ *error_message = string;
+ string = NULL;
+ }
- if (buflen < ++offset + len)
+ break;
+ case DHCP_OPTION_OVERLOAD:
+ if (len != 1)
return -EINVAL;
- if (cb)
- cb(code, len, &options[offset], userdata);
+ if (overload)
+ *overload = *option;
- offset += len;
+ break;
+
+ default:
+ if (cb)
+ cb(code, len, option, userdata);
break;
}
+
+ offset += len;
}
if (offset < buflen)
@@ -213,8 +228,8 @@ static int parse_options(const uint8_t options[], size_t buflen, uint8_t *overlo
return 0;
}
-int dhcp_option_parse(DHCPMessage *message, size_t len,
- dhcp_option_cb_t cb, void *userdata) {
+int dhcp_option_parse(DHCPMessage *message, size_t len, dhcp_option_cb_t cb, void *userdata, char **_error_message) {
+ _cleanup_free_ char *error_message = NULL;
uint8_t overload = 0;
uint8_t message_type = 0;
int r;
@@ -227,27 +242,29 @@ int dhcp_option_parse(DHCPMessage *message, size_t len,
len -= sizeof(DHCPMessage);
- r = parse_options(message->options, len, &overload, &message_type,
- cb, userdata);
+ r = parse_options(message->options, len, &overload, &message_type, &error_message, cb, userdata);
if (r < 0)
return r;
if (overload & DHCP_OVERLOAD_FILE) {
- r = parse_options(message->file, sizeof(message->file),
- NULL, &message_type, cb, userdata);
+ r = parse_options(message->file, sizeof(message->file), NULL, &message_type, &error_message, cb, userdata);
if (r < 0)
return r;
}
if (overload & DHCP_OVERLOAD_SNAME) {
- r = parse_options(message->sname, sizeof(message->sname),
- NULL, &message_type, cb, userdata);
+ r = parse_options(message->sname, sizeof(message->sname), NULL, &message_type, &error_message, cb, userdata);
if (r < 0)
return r;
}
- if (message_type)
- return message_type;
+ if (message_type == 0)
+ return -ENOMSG;
+
+ if (_error_message && IN_SET(message_type, DHCP_NAK, DHCP_DECLINE)) {
+ *_error_message = error_message;
+ error_message = NULL;
+ }
- return -ENOMSG;
+ return message_type;
}
diff --git a/src/libsystemd-network/dhcp-protocol.h b/src/libsystemd-network/dhcp-protocol.h
index 88a81d2866..f65529a00e 100644
--- a/src/libsystemd-network/dhcp-protocol.h
+++ b/src/libsystemd-network/dhcp-protocol.h
@@ -21,8 +21,8 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <netinet/udp.h>
#include <netinet/ip.h>
+#include <netinet/udp.h>
#include <stdint.h>
#include "macro.h"
@@ -132,11 +132,13 @@ enum {
DHCP_OPTION_MESSAGE_TYPE = 53,
DHCP_OPTION_SERVER_IDENTIFIER = 54,
DHCP_OPTION_PARAMETER_REQUEST_LIST = 55,
+ DHCP_OPTION_ERROR_MESSAGE = 56,
DHCP_OPTION_MAXIMUM_MESSAGE_SIZE = 57,
DHCP_OPTION_RENEWAL_T1_TIME = 58,
DHCP_OPTION_REBINDING_T2_TIME = 59,
DHCP_OPTION_VENDOR_CLASS_IDENTIFIER = 60,
DHCP_OPTION_CLIENT_IDENTIFIER = 61,
+ DHCP_OPTION_FQDN = 81,
DHCP_OPTION_NEW_POSIX_TIMEZONE = 100,
DHCP_OPTION_NEW_TZDB_TIMEZONE = 101,
DHCP_OPTION_CLASSLESS_STATIC_ROUTE = 121,
@@ -144,3 +146,12 @@ enum {
DHCP_OPTION_PRIVATE_LAST = 254,
DHCP_OPTION_END = 255,
};
+
+#define DHCP_MAX_FQDN_LENGTH 255
+
+enum {
+ DHCP_FQDN_FLAG_S = (1 << 0),
+ DHCP_FQDN_FLAG_O = (1 << 1),
+ DHCP_FQDN_FLAG_E = (1 << 2),
+ DHCP_FQDN_FLAG_N = (1 << 3),
+};
diff --git a/src/libsystemd-network/dhcp-server-internal.h b/src/libsystemd-network/dhcp-server-internal.h
index 3b88b93d9a..a42f622c37 100644
--- a/src/libsystemd-network/dhcp-server-internal.h
+++ b/src/libsystemd-network/dhcp-server-internal.h
@@ -22,14 +22,13 @@
#pragma once
-#include "sd-event.h"
#include "sd-dhcp-server.h"
+#include "sd-event.h"
+#include "dhcp-internal.h"
#include "hashmap.h"
-#include "util.h"
#include "log.h"
-
-#include "dhcp-internal.h"
+#include "util.h"
typedef struct DHCPClientId {
size_t length;
diff --git a/src/libsystemd-network/dhcp6-lease-internal.h b/src/libsystemd-network/dhcp6-lease-internal.h
index 4edecf7711..f6cf0b30d3 100644
--- a/src/libsystemd-network/dhcp6-lease-internal.h
+++ b/src/libsystemd-network/dhcp6-lease-internal.h
@@ -25,6 +25,7 @@
#include <stdint.h>
#include "sd-dhcp6-lease.h"
+
#include "dhcp6-internal.h"
struct sd_dhcp6_lease {
diff --git a/src/libsystemd-network/dhcp6-option.c b/src/libsystemd-network/dhcp6-option.c
index 62023a9e49..850212aea1 100644
--- a/src/libsystemd-network/dhcp6-option.c
+++ b/src/libsystemd-network/dhcp6-option.c
@@ -360,7 +360,6 @@ int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, char *
/* End of name */
break;
else if (c <= 63) {
- _cleanup_free_ char *t = NULL;
const char *label;
/* Literal label */
@@ -369,21 +368,20 @@ int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, char *
if (pos > optlen)
return -EMSGSIZE;
- r = dns_label_escape(label, c, &t);
- if (r < 0)
- goto fail;
-
- if (!GREEDY_REALLOC0(ret, allocated, n + !first + strlen(t) + 1)) {
+ if (!GREEDY_REALLOC(ret, allocated, n + !first + DNS_LABEL_ESCAPED_MAX)) {
r = -ENOMEM;
goto fail;
}
- if (!first)
- ret[n++] = '.';
- else
+ if (first)
first = false;
+ else
+ ret[n++] = '.';
+
+ r = dns_label_escape(label, c, ret + n, DNS_LABEL_ESCAPED_MAX);
+ if (r < 0)
+ goto fail;
- memcpy(ret + n, t, r);
n += r;
continue;
} else {
diff --git a/src/libsystemd-network/icmp6-util.c b/src/libsystemd-network/icmp6-util.c
index 91308bf6c3..acad9d7d6a 100644
--- a/src/libsystemd-network/icmp6-util.c
+++ b/src/libsystemd-network/icmp6-util.c
@@ -47,17 +47,15 @@ int icmp6_bind_router_solicitation(int index) {
.ipv6mr_interface = index,
};
_cleanup_close_ int s = -1;
- int r, zero = 0, hops = 255;
+ int r, zero = 0, one = 1, hops = 255;
- s = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK,
- IPPROTO_ICMPV6);
+ s = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK, IPPROTO_ICMPV6);
if (s < 0)
return -errno;
ICMP6_FILTER_SETBLOCKALL(&filter);
ICMP6_FILTER_SETPASS(ND_ROUTER_ADVERT, &filter);
- r = setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filter,
- sizeof(filter));
+ r = setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filter, sizeof(filter));
if (r < 0)
return -errno;
@@ -65,23 +63,23 @@ int icmp6_bind_router_solicitation(int index) {
IPV6_PKTINFO socket option also applies for ICMPv6 multicast.
Empirical experiments indicates otherwise and therefore an
IPV6_MULTICAST_IF socket option is used here instead */
- r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_IF, &index,
- sizeof(index));
+ r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_IF, &index, sizeof(index));
if (r < 0)
return -errno;
- r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &zero,
- sizeof(zero));
+ r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &zero, sizeof(zero));
if (r < 0)
return -errno;
- r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hops,
- sizeof(hops));
+ r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hops, sizeof(hops));
if (r < 0)
return -errno;
- r = setsockopt(s, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq,
- sizeof(mreq));
+ r = setsockopt(s, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
+ if (r < 0)
+ return -errno;
+
+ r = setsockopt(s, SOL_IPV6, IPV6_RECVHOPLIMIT, &one, sizeof(one));
if (r < 0)
return -errno;
@@ -101,25 +99,25 @@ int icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
struct ether_addr rs_opt_mac;
} _packed_ rs = {
.rs.nd_rs_type = ND_ROUTER_SOLICIT,
+ .rs_opt.nd_opt_type = ND_OPT_SOURCE_LINKADDR,
+ .rs_opt.nd_opt_len = 1,
};
- struct iovec iov[1] = {
- { &rs, },
+ struct iovec iov = {
+ .iov_base = &rs,
+ .iov_len = sizeof(rs),
};
struct msghdr msg = {
.msg_name = &dst,
.msg_namelen = sizeof(dst),
- .msg_iov = iov,
+ .msg_iov = &iov,
.msg_iovlen = 1,
};
int r;
- if (ether_addr) {
- memcpy(&rs.rs_opt_mac, ether_addr, ETH_ALEN);
- rs.rs_opt.nd_opt_type = ND_OPT_SOURCE_LINKADDR;
- rs.rs_opt.nd_opt_len = 1;
- iov[0].iov_len = sizeof(rs);
- } else
- iov[0].iov_len = sizeof(rs.rs);
+ assert(s >= 0);
+ assert(ether_addr);
+
+ rs.rs_opt_mac = *ether_addr;
r = sendmsg(s, &msg, 0);
if (r < 0)
diff --git a/src/libsystemd-network/lldp-tlv.h b/src/libsystemd-network/lldp-tlv.h
index ca1da113d5..f5cd77477f 100644
--- a/src/libsystemd-network/lldp-tlv.h
+++ b/src/libsystemd-network/lldp-tlv.h
@@ -24,12 +24,12 @@
#include <net/ethernet.h>
-#include "util.h"
-#include "lldp.h"
-#include "list.h"
-
#include "sd-lldp.h"
+#include "list.h"
+#include "lldp.h"
+#include "util.h"
+
typedef struct sd_lldp_packet tlv_packet;
typedef struct sd_lldp_section tlv_section;
diff --git a/src/libsystemd-network/network-internal.h b/src/libsystemd-network/network-internal.h
index d516f2dafd..8a30921966 100644
--- a/src/libsystemd-network/network-internal.h
+++ b/src/libsystemd-network/network-internal.h
@@ -23,8 +23,8 @@
#include <stdbool.h>
-#include "udev.h"
#include "condition.h"
+#include "udev.h"
bool net_match_config(const struct ether_addr *match_mac,
char * const *match_path,
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 137537253a..7deb00af9c 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -34,6 +34,8 @@
#include "dhcp-internal.h"
#include "dhcp-lease-internal.h"
#include "dhcp-protocol.h"
+#include "dns-domain.h"
+#include "hostname-util.h"
#include "random-util.h"
#include "string-util.h"
#include "util.h"
@@ -298,6 +300,9 @@ int sd_dhcp_client_set_hostname(sd_dhcp_client *client,
assert_return(client, -EINVAL);
+ if (!hostname_is_valid(hostname, false) && !dns_name_is_valid(hostname))
+ return -EINVAL;
+
if (streq_ptr(client->hostname, hostname))
return 0;
@@ -539,6 +544,24 @@ static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
return 0;
}
+static int client_append_fqdn_option(DHCPMessage *message, size_t optlen, size_t *optoffset,
+ const char *fqdn) {
+ uint8_t buffer[3 + DHCP_MAX_FQDN_LENGTH];
+ int r;
+
+ buffer[0] = DHCP_FQDN_FLAG_S | /* Request server to perform A RR DNS updates */
+ DHCP_FQDN_FLAG_E; /* Canonical wire format */
+ buffer[1] = 0; /* RCODE1 (deprecated) */
+ buffer[2] = 0; /* RCODE2 (deprecated) */
+
+ r = dns_name_to_wire_format(fqdn, buffer + 3, sizeof(buffer) - 3);
+ if (r > 0)
+ r = dhcp_option_append(message, optlen, optoffset, 0,
+ DHCP_OPTION_FQDN, 3 + r, buffer);
+
+ return r;
+}
+
static int dhcp_client_send_raw(sd_dhcp_client *client, DHCPPacket *packet,
size_t len) {
dhcp_packet_append_ip_headers(packet, INADDR_ANY, DHCP_PORT_CLIENT,
@@ -576,13 +599,21 @@ static int client_send_discover(sd_dhcp_client *client) {
return r;
}
- /* it is unclear from RFC 2131 if client should send hostname in
- DHCPDISCOVER but dhclient does and so we do as well
- */
if (client->hostname) {
- r = dhcp_option_append(&discover->dhcp, optlen, &optoffset, 0,
- DHCP_OPTION_HOST_NAME,
- strlen(client->hostname), client->hostname);
+ /* According to RFC 4702 "clients that send the Client FQDN option in
+ their messages MUST NOT also send the Host Name option". Just send
+ one of the two depending on the hostname type.
+ */
+ if (dns_name_is_single_label(client->hostname)) {
+ /* it is unclear from RFC 2131 if client should send hostname in
+ DHCPDISCOVER but dhclient does and so we do as well
+ */
+ r = dhcp_option_append(&discover->dhcp, optlen, &optoffset, 0,
+ DHCP_OPTION_HOST_NAME,
+ strlen(client->hostname), client->hostname);
+ } else
+ r = client_append_fqdn_option(&discover->dhcp, optlen, &optoffset,
+ client->hostname);
if (r < 0)
return r;
}
@@ -688,9 +719,13 @@ static int client_send_request(sd_dhcp_client *client) {
}
if (client->hostname) {
- r = dhcp_option_append(&request->dhcp, optlen, &optoffset, 0,
- DHCP_OPTION_HOST_NAME,
- strlen(client->hostname), client->hostname);
+ if (dns_name_is_single_label(client->hostname))
+ r = dhcp_option_append(&request->dhcp, optlen, &optoffset, 0,
+ DHCP_OPTION_HOST_NAME,
+ strlen(client->hostname), client->hostname);
+ else
+ r = client_append_fqdn_option(&request->dhcp, optlen, &optoffset,
+ client->hostname);
if (r < 0)
return r;
}
@@ -1047,7 +1082,7 @@ static int client_handle_offer(sd_dhcp_client *client, DHCPMessage *offer,
return r;
}
- r = dhcp_option_parse(offer, len, dhcp_lease_parse_options, lease);
+ r = dhcp_option_parse(offer, len, dhcp_lease_parse_options, lease, NULL);
if (r != DHCP_OFFER) {
log_dhcp_client(client, "received message was not an OFFER, ignoring");
return -ENOMSG;
@@ -1086,7 +1121,7 @@ static int client_handle_forcerenew(sd_dhcp_client *client, DHCPMessage *force,
size_t len) {
int r;
- r = dhcp_option_parse(force, len, NULL, NULL);
+ r = dhcp_option_parse(force, len, NULL, NULL, NULL);
if (r != DHCP_FORCERENEW)
return -ENOMSG;
@@ -1098,6 +1133,7 @@ static int client_handle_forcerenew(sd_dhcp_client *client, DHCPMessage *force,
static int client_handle_ack(sd_dhcp_client *client, DHCPMessage *ack,
size_t len) {
_cleanup_dhcp_lease_unref_ sd_dhcp_lease *lease = NULL;
+ _cleanup_free_ char *error_message = NULL;
int r;
r = dhcp_lease_new(&lease);
@@ -1112,9 +1148,9 @@ static int client_handle_ack(sd_dhcp_client *client, DHCPMessage *ack,
return r;
}
- r = dhcp_option_parse(ack, len, dhcp_lease_parse_options, lease);
+ r = dhcp_option_parse(ack, len, dhcp_lease_parse_options, lease, &error_message);
if (r == DHCP_NAK) {
- log_dhcp_client(client, "NAK");
+ log_dhcp_client(client, "NAK: %s", strna(error_message));
return -EADDRNOTAVAIL;
}
@@ -1478,9 +1514,8 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
r = ioctl(fd, FIONREAD, &buflen);
if (r < 0)
- return r;
-
- if (buflen < 0)
+ return -errno;
+ else if (buflen < 0)
/* this can't be right */
return -EIO;
@@ -1490,26 +1525,28 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
len = read(fd, message, buflen);
if (len < 0) {
- log_dhcp_client(client, "could not receive message from UDP "
- "socket: %m");
- return 0;
+ if (errno == EAGAIN || errno == EINTR)
+ return 0;
+
+ log_dhcp_client(client, "Could not receive message from UDP socket: %m");
+ return -errno;
} else if ((size_t)len < sizeof(DHCPMessage)) {
- log_dhcp_client(client, "too small to be a DHCP message: ignoring");
+ log_dhcp_client(client, "Too small to be a DHCP message: ignoring");
return 0;
}
if (be32toh(message->magic) != DHCP_MAGIC_COOKIE) {
- log_dhcp_client(client, "not a DHCP message: ignoring");
+ log_dhcp_client(client, "Not a DHCP message: ignoring");
return 0;
}
if (message->op != BOOTREPLY) {
- log_dhcp_client(client, "not a BOOTREPLY message: ignoring");
+ log_dhcp_client(client, "Not a BOOTREPLY message: ignoring");
return 0;
}
if (message->htype != client->arp_type) {
- log_dhcp_client(client, "packet type does not match client type");
+ log_dhcp_client(client, "Packet type does not match client type");
return 0;
}
@@ -1523,13 +1560,12 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
}
if (message->hlen != expected_hlen) {
- log_dhcp_client(client, "unexpected packet hlen %d", message->hlen);
+ log_dhcp_client(client, "Unexpected packet hlen %d", message->hlen);
return 0;
}
if (memcmp(&message->chaddr[0], expected_chaddr, ETH_ALEN)) {
- log_dhcp_client(client, "received chaddr does not match "
- "expected: ignoring");
+ log_dhcp_client(client, "Received chaddr does not match expected: ignoring");
return 0;
}
@@ -1537,8 +1573,7 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
be32toh(message->xid) != client->xid) {
/* in BOUND state, we may receive FORCERENEW with xid set by server,
so ignore the xid in this case */
- log_dhcp_client(client, "received xid (%u) does not match "
- "expected (%u): ignoring",
+ log_dhcp_client(client, "Received xid (%u) does not match expected (%u): ignoring",
be32toh(message->xid), client->xid);
return 0;
}
@@ -1567,9 +1602,8 @@ static int client_receive_message_raw(sd_event_source *s, int fd,
r = ioctl(fd, FIONREAD, &buflen);
if (r < 0)
- return r;
-
- if (buflen < 0)
+ return -errno;
+ else if (buflen < 0)
/* this can't be right */
return -EIO;
@@ -1582,9 +1616,12 @@ static int client_receive_message_raw(sd_event_source *s, int fd,
len = recvmsg(fd, &msg, 0);
if (len < 0) {
- log_dhcp_client(client, "could not receive message from raw "
- "socket: %m");
- return 0;
+ if (errno == EAGAIN || errno == EINTR)
+ return 0;
+
+ log_dhcp_client(client, "Could not receive message from raw socket: %m");
+
+ return -errno;
} else if ((size_t)len < sizeof(DHCPPacket))
return 0;
diff --git a/src/libsystemd-network/sd-dhcp-lease.c b/src/libsystemd-network/sd-dhcp-lease.c
index 8befedc500..fccdc01bc3 100644
--- a/src/libsystemd-network/sd-dhcp-lease.c
+++ b/src/libsystemd-network/sd-dhcp-lease.c
@@ -661,7 +661,7 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
break;
default:
- log_debug("Ignoring option DHCP option %i while parsing.", code);
+ log_debug("Ignoring option DHCP option %"PRIu8" while parsing.", code);
break;
}
diff --git a/src/libsystemd-network/sd-dhcp-server.c b/src/libsystemd-network/sd-dhcp-server.c
index 277c88e2b9..587ff936ba 100644
--- a/src/libsystemd-network/sd-dhcp-server.c
+++ b/src/libsystemd-network/sd-dhcp-server.c
@@ -699,6 +699,7 @@ static int get_pool_offset(sd_dhcp_server *server, be32_t requested_ip) {
int dhcp_server_handle_message(sd_dhcp_server *server, DHCPMessage *message,
size_t length) {
_cleanup_dhcp_request_free_ DHCPRequest *req = NULL;
+ _cleanup_free_ char *error_message = NULL;
DHCPLease *existing_lease;
int type, r;
@@ -714,7 +715,7 @@ int dhcp_server_handle_message(sd_dhcp_server *server, DHCPMessage *message,
if (!req)
return -ENOMEM;
- type = dhcp_option_parse(message, length, parse_request, req);
+ type = dhcp_option_parse(message, length, parse_request, req, &error_message);
if (type < 0)
return 0;
@@ -784,8 +785,7 @@ int dhcp_server_handle_message(sd_dhcp_server *server, DHCPMessage *message,
break;
}
case DHCP_DECLINE:
- log_dhcp_server(server, "DECLINE (0x%x)",
- be32toh(req->message->xid));
+ log_dhcp_server(server, "DECLINE (0x%x): %s", be32toh(req->message->xid), strna(error_message));
/* TODO: make sure we don't offer this address again */
@@ -963,10 +963,10 @@ static int server_receive_message(sd_event_source *s, int fd,
if (ioctl(fd, FIONREAD, &buflen) < 0)
return -errno;
- if (buflen < 0)
+ else if (buflen < 0)
return -EIO;
- message = malloc0(buflen);
+ message = malloc(buflen);
if (!message)
return -ENOMEM;
@@ -974,9 +974,12 @@ static int server_receive_message(sd_event_source *s, int fd,
iov.iov_len = buflen;
len = recvmsg(fd, &msg, 0);
- if (len < buflen)
- return 0;
- else if ((size_t)len < sizeof(DHCPMessage))
+ if (len < 0) {
+ if (errno == EAGAIN || errno == EINTR)
+ return 0;
+
+ return -errno;
+ } else if ((size_t)len < sizeof(DHCPMessage))
return 0;
CMSG_FOREACH(cmsg, &msg) {
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 801331d270..36d909a4c5 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -895,7 +895,7 @@ static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *adver
static int client_receive_message(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
sd_dhcp6_client *client = userdata;
DHCP6_CLIENT_DONT_DESTROY(client);
- _cleanup_free_ DHCP6Message *message;
+ _cleanup_free_ DHCP6Message *message = NULL;
int r, buflen, len;
assert(s);
@@ -903,18 +903,26 @@ static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
assert(client->event);
r = ioctl(fd, FIONREAD, &buflen);
- if (r < 0 || buflen <= 0)
- buflen = DHCP6_MIN_OPTIONS_SIZE;
+ if (r < 0)
+ return -errno;
+ else if (buflen < 0)
+ /* This really should not happen */
+ return -EIO;
- message = malloc0(buflen);
+ message = malloc(buflen);
if (!message)
return -ENOMEM;
len = read(fd, message, buflen);
- if ((size_t)len < sizeof(DHCP6Message)) {
- log_dhcp6_client(client, "could not receive message from UDP socket: %m");
+ if (len < 0) {
+ if (errno == EAGAIN || errno == EINTR)
+ return 0;
+
+ log_dhcp6_client(client, "Could not receive message from UDP socket: %m");
+
+ return -errno;
+ } else if ((size_t)len < sizeof(DHCP6Message))
return 0;
- }
switch(message->type) {
case DHCP6_SOLICIT:
diff --git a/src/libsystemd-network/sd-ndisc.c b/src/libsystemd-network/sd-ndisc.c
index 6703d87bc4..f2bce3b99f 100644
--- a/src/libsystemd-network/sd-ndisc.c
+++ b/src/libsystemd-network/sd-ndisc.c
@@ -32,6 +32,7 @@
#include "in-addr-util.h"
#include "list.h"
#include "socket-util.h"
+#include "string-util.h"
#define NDISC_ROUTER_SOLICITATION_INTERVAL 4 * USEC_PER_SEC
#define NDISC_MAX_ROUTER_SOLICITATIONS 3
@@ -417,8 +418,7 @@ static int ndisc_prefix_update(sd_ndisc *nd, ssize_t len,
return 0;
}
-static int ndisc_ra_parse(sd_ndisc *nd, struct nd_router_advert *ra,
- ssize_t len) {
+static int ndisc_ra_parse(sd_ndisc *nd, struct nd_router_advert *ra, ssize_t len) {
void *opt;
struct nd_opt_hdr *opt_hdr;
@@ -481,30 +481,86 @@ static int ndisc_ra_parse(sd_ndisc *nd, struct nd_router_advert *ra,
static int ndisc_router_advertisment_recv(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
_cleanup_free_ struct nd_router_advert *ra = NULL;
sd_ndisc *nd = userdata;
- int r, buflen = 0, pref, stateful;
- union sockaddr_union router = {};
- socklen_t router_len = sizeof(router);
+ union {
+ struct cmsghdr cmsghdr;
+ uint8_t buf[CMSG_LEN(sizeof(int))];
+ } control = {};
+ struct iovec iov = {};
+ union sockaddr_union sa = {};
+ struct msghdr msg = {
+ .msg_name = &sa.sa,
+ .msg_namelen = sizeof(sa),
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ .msg_control = &control,
+ .msg_controllen = sizeof(control),
+ };
+ struct cmsghdr *cmsg;
+ struct in6_addr *gw;
unsigned lifetime;
ssize_t len;
+ int r, pref, stateful, buflen = 0;
assert(s);
assert(nd);
assert(nd->event);
r = ioctl(fd, FIONREAD, &buflen);
- if (r < 0 || buflen <= 0)
- buflen = ICMP6_RECV_SIZE;
+ if (r < 0)
+ return -errno;
+ else if (buflen < 0)
+ /* This really should not happen */
+ return -EIO;
+
+ iov.iov_len = buflen;
- ra = malloc(buflen);
+ ra = malloc(iov.iov_len);
if (!ra)
return -ENOMEM;
- len = recvfrom(fd, ra, buflen, 0, &router.sa, &router_len);
+ iov.iov_base = ra;
+
+ len = recvmsg(fd, &msg, 0);
if (len < 0) {
+ if (errno == EAGAIN || errno == EINTR)
+ return 0;
+
log_ndisc(nd, "Could not receive message from ICMPv6 socket: %m");
+ return -errno;
+ } else if ((size_t)len < sizeof(struct nd_router_advert)) {
return 0;
- } else if (router_len != sizeof(router.in6) && router_len != 0) {
- log_ndisc(nd, "Received invalid source address size from ICMPv6 socket: %zu bytes", (size_t)router_len);
+ } else if (msg.msg_namelen == 0)
+ gw = NULL; /* only happens when running the test-suite over a socketpair */
+ else if (msg.msg_namelen != sizeof(sa.in6)) {
+ log_ndisc(nd, "Received invalid source address size from ICMPv6 socket: %zu bytes", (size_t)msg.msg_namelen);
+ return 0;
+ } else
+ gw = &sa.in6.sin6_addr;
+
+ assert(!(msg.msg_flags & MSG_CTRUNC));
+ assert(!(msg.msg_flags & MSG_TRUNC));
+
+ CMSG_FOREACH(cmsg, &msg) {
+ if (cmsg->cmsg_level == SOL_IPV6 &&
+ cmsg->cmsg_type == IPV6_HOPLIMIT &&
+ cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
+ int hops = *(int*)CMSG_DATA(cmsg);
+
+ if (hops != 255) {
+ log_ndisc(nd, "Received RA with invalid hop limit %d. Ignoring.", hops);
+ return 0;
+ }
+
+ break;
+ }
+ }
+
+ if (gw && !in_addr_is_link_local(AF_INET6, (const union in_addr_union*) gw)) {
+ _cleanup_free_ char *addr = NULL;
+
+ (void)in_addr_to_string(AF_INET6, (const union in_addr_union*) gw, &addr);
+
+ log_ndisc(nd, "Received RA from non-link-local address %s. Ignoring.", strna(addr));
return 0;
}
@@ -544,7 +600,7 @@ static int ndisc_router_advertisment_recv(sd_event_source *s, int fd, uint32_t r
}
if (nd->router_callback)
- nd->router_callback(nd, stateful, router_len != 0 ? &router.in6.sin6_addr : NULL, lifetime, pref, nd->userdata);
+ nd->router_callback(nd, stateful, gw, lifetime, pref, nd->userdata);
return 0;
}
@@ -552,8 +608,6 @@ static int ndisc_router_advertisment_recv(sd_event_source *s, int fd, uint32_t r
static int ndisc_router_solicitation_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
sd_ndisc *nd = userdata;
uint64_t time_now, next_timeout;
- struct ether_addr unset = { };
- struct ether_addr *addr = NULL;
int r;
assert(s);
@@ -567,10 +621,7 @@ static int ndisc_router_solicitation_timeout(sd_event_source *s, uint64_t usec,
nd->callback(nd, SD_NDISC_EVENT_TIMEOUT, nd->userdata);
nd->state = NDISC_STATE_ADVERTISMENT_LISTEN;
} else {
- if (memcmp(&nd->mac_addr, &unset, sizeof(struct ether_addr)))
- addr = &nd->mac_addr;
-
- r = icmp6_send_router_solicitation(nd->fd, addr);
+ r = icmp6_send_router_solicitation(nd->fd, &nd->mac_addr);
if (r < 0)
log_ndisc(nd, "Error sending Router Solicitation");
else {
diff --git a/src/libsystemd-network/test-dhcp-client.c b/src/libsystemd-network/test-dhcp-client.c
index 1200a7c251..4478147a83 100644
--- a/src/libsystemd-network/test-dhcp-client.c
+++ b/src/libsystemd-network/test-dhcp-client.c
@@ -223,7 +223,7 @@ int dhcp_network_send_udp_socket(int s, be32_t address, uint16_t port, const voi
static int test_discover_message_verify(size_t size, struct DHCPMessage *dhcp) {
int res;
- res = dhcp_option_parse(dhcp, size, check_options, NULL);
+ res = dhcp_option_parse(dhcp, size, check_options, NULL, NULL);
assert_se(res == DHCP_DISCOVER);
if (verbose)
@@ -390,7 +390,7 @@ static int test_addr_acq_recv_request(size_t size, DHCPMessage *request) {
uint8_t *msg_bytes = (uint8_t *)request;
int res;
- res = dhcp_option_parse(request, size, check_options, NULL);
+ res = dhcp_option_parse(request, size, check_options, NULL, NULL);
assert_se(res == DHCP_REQUEST);
assert_se(xid == request->xid);
@@ -420,7 +420,7 @@ static int test_addr_acq_recv_discover(size_t size, DHCPMessage *discover) {
uint8_t *msg_bytes = (uint8_t *)discover;
int res;
- res = dhcp_option_parse(discover, size, check_options, NULL);
+ res = dhcp_option_parse(discover, size, check_options, NULL, NULL);
assert_se(res == DHCP_DISCOVER);
assert_se(msg_bytes[size - 1] == DHCP_OPTION_END);
diff --git a/src/libsystemd-network/test-dhcp-option.c b/src/libsystemd-network/test-dhcp-option.c
index 3607df63af..75d22c4df3 100644
--- a/src/libsystemd-network/test-dhcp-option.c
+++ b/src/libsystemd-network/test-dhcp-option.c
@@ -75,9 +75,8 @@ static const char *dhcp_type(int type) {
static void test_invalid_buffer_length(void) {
DHCPMessage message;
- assert_se(dhcp_option_parse(&message, 0, NULL, NULL) == -EINVAL);
- assert_se(dhcp_option_parse(&message, sizeof(DHCPMessage) - 1, NULL, NULL)
- == -EINVAL);
+ assert_se(dhcp_option_parse(&message, 0, NULL, NULL, NULL) == -EINVAL);
+ assert_se(dhcp_option_parse(&message, sizeof(DHCPMessage) - 1, NULL, NULL, NULL) == -EINVAL);
}
static void test_message_init(void) {
@@ -101,7 +100,7 @@ static void test_message_init(void) {
assert_se(magic[2] == 83);
assert_se(magic[3] == 99);
- assert_se(dhcp_option_parse(message, len, NULL, NULL) >= 0);
+ assert_se(dhcp_option_parse(message, len, NULL, NULL, NULL) >= 0);
}
static DHCPMessage *create_message(uint8_t *options, uint16_t optlen,
@@ -264,19 +263,12 @@ static void test_options(struct option_desc *desc) {
buflen = sizeof(DHCPMessage) + optlen;
if (!desc) {
- assert_se((res = dhcp_option_parse(message, buflen,
- test_options_cb,
- NULL)) == -ENOMSG);
+ assert_se((res = dhcp_option_parse(message, buflen, test_options_cb, NULL, NULL)) == -ENOMSG);
} else if (desc->success) {
- assert_se((res = dhcp_option_parse(message, buflen,
- test_options_cb,
- desc)) >= 0);
- assert_se(desc->pos == -1 && desc->filepos == -1 &&
- desc->snamepos == -1);
+ assert_se((res = dhcp_option_parse(message, buflen, test_options_cb, desc, NULL)) >= 0);
+ assert_se(desc->pos == -1 && desc->filepos == -1 && desc->snamepos == -1);
} else
- assert_se((res = dhcp_option_parse(message, buflen,
- test_options_cb,
- desc)) < 0);
+ assert_se((res = dhcp_option_parse(message, buflen, test_options_cb, desc, NULL)) < 0);
if (verbose)
printf("DHCP type %s\n", dhcp_type(res));
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-01-08 23:08:20 +0000